FDSC 2000 Chapter : Ch4 Challenge
Document Summary
Chapter 4 challenge: a solution is a homogenous mixture in which a solute is dissolved in a solvent, where an emulsion is a colloidal dispersion of two liquids, usually oil and water that are immiscible. A mixture is just a physical combination of two or more substances, not necessarily a dissolved substance in another. A colloidal dispersion is the substance of food colloids suspended in a solvent. So a solution has dissolved particles, the colloidal dispersion has undissolved matter in a solvent: raw unprocessed milk is a heterogeneous substance containing protein like casein, fat that causes creaming, and water, which must be homogenized. Milk has a liquid- in-liquid colloidal dispersion with the water and the fat. Even though water and oil have a greater attraction than oil-to-oil, the water-to-water attraction is the greatest. This means the hydrophobic oil molecules are suspended in the water molecules in an o/w dispersion; this makes the solution unstable.
